Air To Water Heat Pump manufacturers This is an energy-efficient heat pump that simultaneously meets domestic heating, domestic hot water, and cooling requirements. It can produce domestic hot water all year round, provide heating in winter, and air-conditioning in summer. There are three end connections: floor heating, radiator, and fan coil.website:http://www.prome-e.com/heat-pump-for-home/air-to-water-heat-pump/